Nazare Big Wave Challenge Gets Yellow Alert, Could Run Saturday in Giant Waves
70-foot plus waves predicted for Portuguese big wave tow surfing competition.
Surf Forecasts:
Mavericks surfForecast / CAL – San Mateo / USA
48hr Weather and Surf, issued 3 pm Saturday 13 Dec 2025 PSTForecast update in hr min s Forecast update imminent
Mavericks surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mavericks sea temperature is
13.1° C
(Which is normal for this time of year)How big are the waves at Mavericks today?
The current surf forecast for Mavericks at 7PM is: 0.7m 11s primary swell from a West direction and 0.2m 12s secondary swell from a South-southwest direction, 0.3m 4s secondary swell from a South direction (forecast issued at 03:00pm December 13). The wind direction is predicted to be glassy.
| Time (PST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Dec) | - | - |
| Afternoon (13 Dec) | 2.5ft (0.8m) | 12s |
| Evening (13 Dec) | 2.5ft (0.7m) | 12s |
Table - waves today at Mavericks. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 12 | 12 | 11 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 12 | 12 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 183 | 171 | 127 | 132 | 139 | 103 | 101 | 90 | 61 | 59 | 82 | 76 | 71 | 68 | 65 | 58 | 56 | 55 | 37 | 38 | 174 | 255 | 520 | 678 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | glass | glass | glass | glass | glass | off | glass | off | glass | glass | cross | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- on | cross- on | cross | cross- on | cross- on | glass | cross- on |
High Tide / height (m) | 6:23PM 1.08 | 6:18AM 1.68 | 7:43PM 1.10 | 6:51AM 1.71 | 8:49PM 1.16 | 7:23AM 1.73 | ||||||||||||||||||
Low Tide / height (m) | 12:32PM 0.39 | 11:45PM 0.59 | 1:22PM 0.22 | 12:34AM 0.73 | 2:06PM 0.07 | 1:21AM 0.85 | ||||||||||||||||||
Saturday 13 | Sunday 14 | Monday 15 | Tuesday 16 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 7:16 | - | - | - | - | - | - | - | 7:16 | - | - | - | - | - | - | - | 7:16 |
| Sunset | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - | - | 4:52 | - | - | - | - | - | - |
 | |  | | | | | | |  |  | | | | | | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 12 | 13 | 12 | 12 | 11 | 11 | 11 | 13 | 16 | 17 | 14 | 14 | 14 | 14 | 14 | 16 | 18 | 17 | 14 | 14 | 14 | 14 | 15 | 16 |
| Feels °C (?) | 10 | 11 | 12 | 11 | 11 | 9 | 9 | 10 | 14 | 15 | 10 | 11 | 11 | 11 | 10 | 12 | 14 | 12 | 11 | 13 | 13 | 13 | 16 | 16 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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